General Chemistry Answers

Elements with very large ionization energies also tend to have highly exothermic electron affinities. Explain. Which group of elements would you expect to be an exception to this statement?

When 8.00 grams of methane reacts it produces 2.4 L of hydrogen gas at 300 K. What is the pressure of the

hydrogen gas?

Determine the [H+] , [OH−] , and pH of a solution with a pOH of 2.81 at 25 °C.

[H+]= 

[OH−]= 

pH= 

Determine the [H+] , [OH−] , and pOH of a solution with a pH of 8.42 at 25 °C.

[H+]= 

[OH−]= 

pOH=

Determine the [H+] , pH, and pOH of a solution with an [OH−] of 7.2×10−8 M at 25 °C.

[H+]= 

pH=

pOH=

Determine the [OH−] , pH, and pOH of a solution with a [H+] of 4.8×10−11 M at 25 °C.

[OH−]=

pH= 

pOH= 

Calculate the hydronium ion, H3O+ , and hydroxide ion, OH− , concentrations for a 0.0111 M HCl solution.

[H3O+]=

[OH−]= 

Calculate the pH for each H3O+ concentration.

[H3O+]=1×10−6 M

pH=

[H3O+]=0.1 M

pH=

[H3O+]=1×10−11 M

pH=

Calculate the H3O+ concentration for each pH.

pH=11[H3O+]= 

pH=2[H3O+]= 

pH=5[H3O+]=

Complete these Brønsted–Lowry reactions.

HCO−3+H+↽−−⇀

HCO−3+OH−↽−−⇀